土壤有机酸与磷素相互作用的研究  

Interaction of Organic Acids and Phosphorus in Soils

作　　者：胡红青[1] 李妍[1] 贺纪正[1] 

机构地区：[1]华中农业大学资源与环境学院,湖北武汉430070

出　　处：《土壤通报》2004年第2期222-229,共8页Chinese Journal of Soil Science

基　　金：国家自然科学基金资助项目(49971050)

摘　　要：土壤有机酸包括低分子量有机酸和腐殖酸,它们构成土壤有机组分中性质较活跃的部分。特别是低分子量有机酸,在土壤形成、养分和污染物的转化过程中起着十分重要的作用,受到土壤、植物营养和环境科学工作者的高度重视。本文着重从它们与磷素相互作用的角度,阐述有关研究进展。主要内容包括:(1)磷营养与植物根系分泌有机酸的特征;(2)有机酸对土壤吸附磷的影响;(3)有机酸与磷的解吸、释放与转化。旨在促进研究工作的深入,并为合理利用磷素,保护生态环境提供科学依据。Soil organic acids consist of low molecular weight organic acids(LMWOA) and humus acids. They are active components of organic substances. Particularly, LMWOA play a very important role in soil genesis and cycle of nutrients and pollutants, therefore, they are studied widely and emphasized by soil , plant nutrition and environmental scientists. In this paper, the advancement of interaction between organic acids and phosphorus has been discussed. The main contents are: (1) phosphorus nutrition and characteristics of root exudates; (2) effects of organic acids on adsorption of phosphate; (3) organic acids and phosphate desorption, release and transformation. The purpose is to deepen the research in the area and provide scientific basis for phosphorus utilization and protection of eco-environment.

关 键 词：土壤 有机酸 磷素 相互作用 腐殖酸 营养水平 

分 类 号：S153[农业科学—土壤学]